I tried to install Mavericks 10.9.0, but I met some errors during the first boot and everytime I want to launch OSX I must use -v -x GraphicsEnabler=No flags. I tried to boot up with the Radeon using the DVI cable but I went into a bad memory allocation (as expected).

So I started OSX in safe mode with the integrated video card and I installed the ATI HD7000 series controller and AMDRadeonAccelerator kexts which I found on this site.

I started again the OS with GraphicsEnabler=No and -v flags, but during the loading I saw lines regarding AMDRadeonAccelerator: "ZTV20AMDACCEL_EVENT_MACHINE is malformed", "falied to load apple.AMDRadeonAccelerator kext" and "[AGPM] unknown platform" and after some minutes the screen didn't receive the signal anymore (so black screen).

I decided to use the internal Intel HD4000 to run OSX, but it crashed without a kernel panic after the message "Bluetooth control not found (or something similar)", So the only option I can use is to boot up with -v -x GraphicsEnabler=No flags.

I've left all the default settings during the installation of OSX.

Is there a solution to fix these video cards? Thank you for the support!